Solar energy in Vigo, Spain
Average irradiation 4.07 kWh/m²/day · ~1188 kWh per kWp per year
Monthly solar irradiation & temperature in Vigo (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.58 | 9.2 | 38 |
| Feb | 2.55 | 9.3 | 62 |
| Mar | 3.66 | 11.0 | 89 |
| Apr | 4.97 | 12.7 | 121 |
| May | 5.96 | 15.1 | 145 |
| Jun | 6.53 | 18.1 | 159 |
| Jul | 6.73 | 20.3 | 164 |
| Aug | 5.98 | 20.6 | 145 |
| Sep | 4.71 | 19.1 | 114 |
| Oct | 2.93 | 15.9 | 71 |
| Nov | 1.84 | 11.8 | 45 |
| Dec | 1.43 | 9.7 | 35 |
Solar potential of Vigo explained
Vigo receives an average of 4.07 kilowatt-hours of solar energy per square metre per day, measured over four decades of satellite observation. In practical terms, every kilowatt-peak of installed PV capacity yields about 1188 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This is a solid mid-range solar resource: production is meaningful year-round, though winter output drops noticeably.
Frequently asked questions
Is solar worth it in Vigo?
With 4.07 kWh/m²/day of average irradiation, a 1 kWp system in Vigo produces roughly 1188 kWh per year. That is a good solar resource; with current panel prices most systems pay back well within their lifetime.
How much electricity would a 5 kW system produce in Vigo?
Approximately 6,000 kWh per year — enough to cover a large share of a typical household's consumption.
What data is this based on?
Long-term satellite observations from NASA POWER (1981–present) and the PVGIS SARAH3 database, assuming a performance ratio of 80%.
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